Geolo()n of Warrandyte Goldjield. 527 



Witli re<rard to [lilrli <ieiieriilly, in the southern portion of the 

 area, no widespread pitch occurs. In places there is possibly 

 apparently small local pitch, but this may be due to the run- 

 nino; out of the anticlines or synclines, and not to crustal move- 

 ments. 



The pitch of the rocks at Warrandyte has been already 

 noticed, and this pitch appears to continue north-easterly along 

 the axis of the Warrandyte Anticline to Watson's Creek, a dis- 

 tance from Warrandyte of five miles. It is well seen where the 

 axis crosses the Maroondah Aqueduct, at which point the beds 

 are pitching to the north-east at an angle of 40 deg. At Wat- 

 son's Creek the feature is repeated, the angle here being 35 deg. 

 At the latter locality the sections are particularly instructive. 

 Almost a semi-circle in the direction of the strike can be traced 

 from the western leg of the anticline, through its axis to the 

 eastern leg. 



This strong pitch together with the eastern and western limbs 

 of the Warrandyte Anticline, gives at Warrandyte three sides of a 

 great dome. A strong southerly pitch towards Ring-wood would 

 complete the dome, but this does not exist. At one time such a 

 pitch may have existed, but the latter may have been destroyed 

 by subsequent differential movements. Of this there is no 

 evidence, except that which may have formed the Mitcham 

 Axis (details of which are given in the separate paper dealing 

 with the physiography of the district), and which would pro- 

 bably not be sufficient to obliterate any pronounced pitch. 



Faults. — These do not appear to be important. Numerous 

 small dip faults occur at the Caledonia Mine, as will be de- 

 scribed later. That in the conglomerate at Anderson's Creek Is 

 also a dip fault, but the horizontal displacement of the rocks 

 may be calculated in yards. Strike faults probably occur in the 

 mines along the reef channels. Casts of slickensides in cjuartz 

 in various parts of the area outside AVarrandyte prove move- 

 ment. Most of the latter appears to have been vertical. That 

 it at times was much from the vertical is shown by the almost 

 horizontal slickensides noticed in some quarries on Ruffley's 

 Creek. No evidence, however, of any inovement that has caused 

 a great displacement has been obtained. Although fractures 

 are numerous in connection with the folds (as at Wantmdyte), 



